US20180290222A1 - A cross-cutting circular saw device and a method of cross-cutting an object by a circular device - Google Patents
A cross-cutting circular saw device and a method of cross-cutting an object by a circular device Download PDFInfo
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- US20180290222A1 US20180290222A1 US15/767,602 US201615767602A US2018290222A1 US 20180290222 A1 US20180290222 A1 US 20180290222A1 US 201615767602 A US201615767602 A US 201615767602A US 2018290222 A1 US2018290222 A1 US 2018290222A1
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- Prior art keywords
- carriage
- saw blade
- saw
- transmission
- guide
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
- B23D47/123—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades acting on the disc of the saw blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/16—Saw benches
- B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
- B27B5/181—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being arranged underneath a work-table
- B27B5/184—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being arranged underneath a work-table the saw blade performing a rectilinear movement only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/02—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/02—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage
- B23D45/021—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage with the saw blade mounted on a carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/02—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage
- B23D45/021—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage with the saw blade mounted on a carriage
- B23D45/022—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage with the saw blade mounted on a carriage the carriage performing a vertical movement only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/18—Machines with circular saw blades for sawing stock while the latter is travelling otherwise than in the direction of the cut
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/02—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/02—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only
- B27B5/06—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels
- B27B5/065—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels with feedable saw blades, e.g. arranged on a carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/02—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only
- B27B5/06—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels
- B27B5/065—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels with feedable saw blades, e.g. arranged on a carriage
- B27B5/075—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels with feedable saw blades, e.g. arranged on a carriage characterised by having a plurality of saw blades, e.g. turning about perpendicular axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/16—Saw benches
- B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7755—Carrier for rotatable tool movable during cutting
- Y10T83/7763—Tool carrier reciprocable rectilinearly
- Y10T83/7776—With means to reciprocate carrier
- Y10T83/778—And means to rotate tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7755—Carrier for rotatable tool movable during cutting
- Y10T83/7788—Tool carrier oscillated or rotated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7793—Means to rotate or oscillate tool
- Y10T83/7797—Including means to rotate both elements of tool pair
- Y10T83/7805—And means to change speed of rotation
Definitions
- the present invention relates to a cross-cutting circular saw device.
- the present invention further relates to a method of cross-cutting an object.
- low weight board elements are widely used. Such elements may comprise a hollow body enclosing a lightweight filling material. Such low weight board elements can be used as building elements, door panels, and as a large number of different furniture elements, such as furniture elements of cabinets, wardrobes, book shelves, table tops etc.
- board elements may include two sheets of a low weight, environmentally friendly and inexpensive material such as fibrous board having a thickness of about 2 millimeters forming the two faces of the board element and spaced apart by spacing elements.
- the spacing elements may include board strips having a thickness of about 2 mm and a width of about 14 to about 18 mm standing on their longitudinal edges parallel to the length of the sheet.
- the spacing elements may also include solid block or pad members, e.g.
- laths provided along each edge of the panel.
- Such laths can be produced by gluing together board strips of the kind described above, and the solid block or pad members can be produced by cutting the laths to pieces of a predetermined length and gluing them together to form the solid block or pad members.
- the board elements could also be of other dimensions and also of other types, including for example chip board and particle board elements.
- the object of the present invention is to provide a cross-cutting circular saw device that minimizes at least one of the above disadvantages.
- the cross-cutting circular saw device comprises:
- a single motor may provide both the reciprocating movement of the carriage and the rotation of the at least one saw blade. Thereby the complexity of the saw device is reduced. Furthermore, the weight of the carriage is reduced, since the single motor is mounted on the frame.
- said at least one saw blade comprises a first circular saw blade and further comprises an additional second circular saw blade carried by the carriage.
- Said first and second saw blades are mounted in tandem with each other, and they are both, at least occasionally, rotated by the second transmission.
- the two saw blades preferably have identical thickness, more preferably the two saw blades are of identical type. Thanks to this feature the trailing saw blade may follow without any substantial resistance in the already cut groove.
- the saw blade/-s is/are connected to its drive shaft via a free wheel device, such that the respective saw blade may only forcibly be driven in one direction, preferably its sawing direction, enabling powering one blade at a time, using one and the same main transmission/motor.
- the free wheel device is a free wheel hub arranged on the carriage, between the drive shaft of the saw blade and the transmission device, such as the sprocket or pulley, being in contact with a power transmitting element. This provides for an energy efficient and low weight arrangement.
- each of the saw blades is connected to a free wheel drive, meaning that each saw blade is only driven when being in position as the leading saw blade, and being driven in its sawing direction, meaning that the saw blade being in position as trailing saw blade is idle rotating in its sawing direction, which rotational direction is opposite to that of the leading saw blade.
- An advantage of this embodiment is that when the carriage changes direction of movement, and thereby also changes from, e.g., driving the first saw blade to driving the second saw blade, the second saw blade, now to become the leading saw blade, is already rotating/idling in its intended sawing direction and therefore accelerating the second saw blade to its intended rotational speed becomes much faster and requires much less power, compared to if it had been necessary to change the rotational direction of the second saw blade.
- each saw blade is always rotating in its intended sawing direction, and is driven when in position as leading saw blade, and idling in the same rotational direction when in position as trailing saw blade.
- the first saw blade is mounted so as to rotate in its sawing direction when the first saw blade is the leading saw blade of the carriage and to rotate in a non-sawing direction when the first saw blade is the trailing saw blade.
- the second saw blade is mounted so as to rotate in its sawing direction when the second saw blade is the leading saw blade of the carriage and to rotate in a non-sawing direction when the second saw blade is the trailing saw blade, i.e. both saw blades are forcibly driven in both directions of carriage movement and the two saw blades are always rotating in the same direction.
- the first transmission may be a mechanical, hydraulic, pneumatic or electric transmission to cause the carriage to reciprocate along the guide, but most preferably it is a first mechanical transmission.
- the motor has an output shaft
- the first mechanical transmission may include mechanically operated rods, but preferably the first mechanical transmission includes a reciprocal chain or belt having two ends attached to the carriage, and at least two wheels in operative contact with the reciprocal chain or belt, of which wheels at least one wheel, which preferably is a sprocket or toothed pulley, is fixed to the output shaft, while the other wheel is mounted rotary on the frame, so that a rotation of the output shaft causes a movement of the carriage along the guide.
- the second transmission suitably includes:
- the second transmission further includes a gearing, operatively connected between said at least one saw blade and the friction and/or form operated transmission device mounted on the carriage, said gearing providing a suitable rotational speed for said at least one saw blade.
- the gearing preferably is a planetary gearing.
- the second transmission further preferably includes at least one guide roller carried by the carriage for guiding the power transmitting element, which has the shape of a belt or chain, such that the power transmitting element wraps a circumferential portion of the transmission device, which has the form of a sprocket or pulley, mounted on the carriage.
- the guide has an acceleration section, where the carriage is accelerated, and the carriage first passes this acceleration section before arriving at the object to be cross-cut, implying that the saw blade has been powered to a desired rotational speed prior to start of cutting in the object.
- the carriage during its travel through the acceleration section reaches at least 50%, more preferably at least 75%, of full speed.
- An advantage of this embodiment is that it provides for accelerating the rotational speed of the saw blade/-s to a suitable speed for efficient cutting of the object to be cross cut.
- the carriage preferably includes a housing surrounding a major portion of said at least one saw blade, said housing preferably having a sawdust outlet adapted to be connected to a suction device for removing sawdust.
- the saw device is suitable for cutting various types of board elements, including but not limited to hollow board elements, chip board elements, particle board elements, solid wood board elements, plywood board elements, fiber board elements, board elements made from combinations of several materials etc.
- a method of cross-cutting an object by a circular saw device comprising a frame; a guide carried by the frame and adapted to span the object to be cross-cut by sawing; a carriage mounted for reciprocal movement along the guide; and at least one circular saw blade carried by the carriage, the method comprising:
- FIG. 1 is a perspective view of a preferred embodiment of a cross-cutting circular saw device in accordance with the present invention and viewed from the feed side.
- FIG. 2 is a perspective view of the saw device of FIG. 1 as viewed from an opposite direction and with some components not shown for better clarity.
- FIG. 3 is a perspective view showing a travelling carriage, parts of the first and second transmissions, and two circular saw blades arranged in tandem.
- FIG. 4 is a perspective view showing from another angle a firmly held object being cut by the saw blade carried by the travelling carriage that has a suction outlet for removing sawdust.
- FIG. 5 is an exploded view of some of the components of the second transmission and the two circular saw blades.
- FIG. 6 is an exploded view of some of the components of the second transmission and the circular saw blades, according to a second embodiment.
- FIG. 7 is a perspective view showing a travelling carriage similar to FIG. 3 , with components as presented in FIG. 6 .
- FIG. 1 shows a preferred embodiment of a cross-cutting circular saw device in accordance with the present invention.
- the saw device comprises a frame 1 , a guide 10 carried by the frame 1 and adapted to span an object 5 (shown in FIG. 4 ) to be cross-cut by sawing, a carriage 3 mounted for reciprocal movement along the guide 10 , at least one circular saw blade 4 A, 4 B carried by the carriage 3 , and a motor 11 for moving the carriage 3 and rotating said at least one saw blade 4 A, 4 B, said motor 11 being fixed to the frame 1 .
- the saw device further comprises a first transmission 2 and a second transmission 8 , 9 . As is best shown in FIG.
- the first transmission 2 is arranged between the motor 11 and the carriage 3 for transforming an output of the motor 11 to a reciprocating movement of the carriage 3 along the guide 10
- the second transmission 8 , 9 is arranged between the carriage 3 and the at least one saw blade 4 A, 4 B for transforming the reciprocating movement of the carriage 3 to a rotation of said at least one saw blade 4 A, 4 B.
- the guide 10 includes two parallel guide rails, an upper one 101 and a lower one 102 best shown in FIG. 4 .
- FIGS. 4 and 5 show that the carriage 3 has at least one upper guide follower 31 cooperating with the upper guide rail 101 , and at least one lower guide follower 32 cooperating with the lower guide rail 102 to permit the carriage 3 to travel along a predetermined path along the guide 10 and across the object 5 to be cross-cut.
- Circular saw blades have been in use for a long time and generally consist of a circular disk with cutting teeth formed into or attached to the periphery of the disk and a bore formed at the center of the disk to allow the mounting of the blade on a rotary driven shaft.
- a circular saw blade includes a generally circular blade portion and a plurality of spaced apart teeth extending outwardly from the circular blade portion. Each tooth has a leading edge and usually a positive rake.
- a tooth that is swept in the intended direction of rotation (that is inclined in the direction of rotation) is said to have a positive rake, a tooth that exhibits no inclination is said to have no rake and a tooth that exhibits inclination opposite to the direction of rotation is said to have a negative rake.
- the positive rake is in a range of between about 20 and about 45 degrees, and a saw blade can perform its sawing function only when rotating in the intended sawing direction.
- Said at least one saw blade 4 A, 4 B may be a symmetrical blade (not shown), where the leading edge and the trailing edge are of identical shape and both edges can be used for cutting independently of the direction of rotation of the saw blade.
- a saw blade can cut the object 5 both during the first stroke of the carriage 3 , when the saw blade rotates in a first direction, and during the return stroke of the carriage 3 , when the saw blade rotes in an opposite direction.
- the saw blade may typically perform its sawing function in the first stroke of the carriage 3 , but such asymmetrical saw blade is not suitable for sawing in the return stroke of the carriage, meaning that the return stroke of the carriage 3 would be performed without contact with any object to be cross-cut.
- said at least one saw blade 4 A, 4 B comprises a first circular saw blade 4 A and an additional second circular saw blade 4 B, both of which are carried by the carriage 3 .
- the first and second saw blades 4 A, 4 B are mounted in tandem with each other, and during a first working stroke of the carriage 3 they are being rotated by the second transmission 8 , 9 together and in a first direction, while during a reverse stroke of the carriage 3 the saw blades 4 A, 4 B are caused to rotate in a second direction being opposite to the first direction.
- the two saw blades preferably are identical and the first saw blade 4 A is mounted so as to rotate in its sawing direction when the first saw blade 4 A is the leading saw blade of the carriage 3 and in a non-sawing direction when the first saw blade 4 A is the trailing saw blade, and similarly, the second saw blade 4 B is mounted so as to rotate in its sawing direction when the second saw blade 4 B is the leading saw blade of the carriage 3 and in a non-sawing direction when the second saw blade 4 B is the trailing saw blade.
- the first and second saw blades 4 A, 4 B may be of identical type, but are mounted opposite to each other on the carriage 3 .
- the saw blade being the trailing saw blade will travel in the cut track made by the leading saw blade, meaning that the trailing saw blade will have little or no contact with the object 5 to be cut.
- the first saw blade 4 A is the leading saw blade and rotates in its sawing direction, counter-clockwise direction in FIG. 4
- the second saw blade 4 B is the trailing saw blade and also rotates in counter-clockwise direction, which is a direction opposite to the sawing direction of second saw blade 4 B, the second saw blade 4 B travelling in a cut track formed by the first saw blade 4 A in the object 5 .
- the motor 11 has an output shaft 111 ( FIG. 1 ) and a reduction gearing 112 ( FIG. 2 ) to reduce the rotational speed of the output shaft 111 , so that a desired travelling speed of the carriage 3 can be obtained.
- the first transmission 2 may be a hydraulic, pneumatic or electric transmission, for example, but suitably it is a mechanical transmission.
- hydraulically or mechanically operated rods could be used for pushing the carriage 3 back and forth, but as is best shown in FIGS.
- the first mechanical transmission 2 preferably includes a reciprocal chain or belt 200 having two ends 201 , 202 attached to the carriage 3 , and at least two wheels 203 , 204 in operative contact with the reciprocal chain or belt 200 , of which wheels 203 , 204 at least one wheel 203 , which preferably is a sprocket or toothed pulley, is fixed to the output shaft 111 , while the other wheel 204 is mounted rotary on the frame 1 , so that a rotation of the output shaft 111 causes a movement of the carriage 3 along the guide 10 .
- the second transmission 8 , 9 preferably includes:
- the second transmission 8 , 9 suitably includes a gearing 92 , 93 best shown in FIGS. 3 and 5 operatively connected between said at least one saw blade 4 A, 4 B and the transmission device 90 , 91 mounted on the carriage 3 , said gearing 92 , 93 providing a suitable rotational speed for said at least one saw blade 4 A, 4 B.
- the gearing preferably is a planetary gearing 92 , 93 for obtaining a desired rotational speed of said at least one saw blade 4 A, 4 B.
- the second transmission 8 , 9 further includes guide rollers 94 , 95 , 96 carried by the carriage 3 for guiding the power transmitting element 80 , which has the shape of a belt or chain, such that the power transmitting element 80 wraps a circumferential portion of the transmission device 90 , 91 , which in a preferred embodiment has the form of a sprocket or pulley 90 , 91 , mounted on the carriage 3 .
- the carriage 3 includes a large front plate 3 A and a smaller first rear plate 3 B adapted to receive an output end and an input end, respectively, of the planetary gearings 92 and 93 .
- the input ends of the planetary gearings 92 and 93 have input shafts, on which the sprockets or pulleys 90 , 91 are mounted.
- a second rear plate 3 C see FIG.
- the large front plate 3 A of the carriage 3 also carries the guide followers 31 , 32 , as best illustrated in FIG. 5 .
- the first and second saw blades 4 A, 4 B are mounted to the respective planetary gearing 92 , 93 at an opposite side, compared to that of the gearings 92 , 93 , of the large front plate 3 A.
- the guide 10 has a total length L along which the carriage 3 may travel during its reciprocating movement, and the saw device has a width W within which objects 5 to be cross-cut can be placed, the width W being smaller than the total length L.
- the guide 10 has an acceleration section 103 , 104 , where the carriage 3 is accelerated, so that the carriage 3 first passes this acceleration section 103 , 104 before arriving at the object 5 . Accelerating the carriage 3 results in accelerating the rotational speed of the saw blades 4 A, 4 B, since the saw blades 4 A, 4 B are driven by the movement of the carriage 3 along the power transmitting element 80 .
- the length LA suitably is such that the carriage 3 during its travel through the acceleration section 103 , 104 will reach at least 50%, more preferably at least 75%, of full speed.
- FIGS. 6 and 7 there are shown views similar to what is also shown in FIGS. 3 and 5 , but presenting an alternative embodiment. In the following merely the differing details/components will be focused upon, due to the fact that most details are the same as already described in connection with FIGS. 3 and 5 .
- FIG. 6 it is shown that a similar kind of power transmitting element 80 as presented in FIGS. 3 and 5 is being used and arranged for rotation of the saw blades 4 A, 4 B, which preferably are clamped between two clamping plates 40 , 41 .
- the belt or chain 80 and the friction and/or form operated transmission devices, e.g. the sprockets or pulleys 90 , 91 .
- the power transmitting element 80 e.g. the belt 80 illustrated in FIG. 7
- the power transmitting element 80 may be fixed to the frame 1 at two attachment points, of which only one attachment point 81 is illustrated in FIG. 7 .
- the second embodiment there is shown a preferred concept of driving the saw blades 4 A, 4 B, i.e. by the use of free wheel devices 98 , 99 arranged within the second transmission 8 , 9 , within a final part 9 of the transmission.
- the free wheel devices 98 , 99 are arranged as free wheel hubs 98 , 99 in the center of the transmission devices 90 , 91 .
- This arrangement merely allows powering of each saw blade 4 A, 4 B in one direction, i.e. allowing the first saw blade 4 A to be powered in its sawing direction, e.g.
- the first saw blade 4 A driven by the pulley 90
- the second saw blade 4 B driven by the pulley 91
- the first saw blade 4 A is always rotating in counter-clockwise direction, and is driven when the carriage 3 is moved to the left, and is idling when the carriage 3 is moved to the right
- the second saw blade 4 B driven by the pulley 91
- the second saw blade 4 B is always rotating in clockwise direction, and is idling when the carriage 3 is moved to the left and is driven when the carriage 3 is moved to the right.
- the carriage 3 suitably includes a housing 30 surrounding a major portion of said at least one saw blade 4 A, 4 B, and it is also suitable that the housing 30 has a sawdust outlet 301 adapted to be connected to a suction device (not shown) for removing sawdust.
- FIG. 4 also shows a holder 13 for holding the object 5 to be cross-cut.
- the holder 13 comprises a plurality of vertical actuators 131 carried by a horizontal beam 130 spanning the width of the object 5 .
- the actuators 131 may be operated electrically, hydraulically, pneumatically or even mechanically to press the object 5 against a suitable counter surface, such as a table or a beam 12 (best shown in FIG. 1 ), for example, having a longitudinal slot 121 for receiving a lower portion of the saw blade 4 A, 4 B during cutting.
- the present invention is applicable primarily in furniture industry, for example when it is desirably to increase production by utilizing also the return stroke of a cross-cutting saw device for cutting the object to be cross-cut, and/or when it is desirable to use a single motor for both rotating the saw blade and traversing the saw blade over the object to be cut.
Abstract
-
- a frame (1);
- a guide (10) carried by the frame (1) and adapted to span an object (5) to be cross-cut by sawing;
- a carriage (3) mounted for reciprocal movement along the guide (10);
- at least one circular saw blade (4A, 4B) carried by the carriage (3);
- a motor (11) for moving the carriage (3) and rotating said at least one saw blade (4A, 4B), said motor (11) being fixed to the frame (1);
- a first transmission (2) arranged between the motor (11) and the carriage (3) for transforming an output of the motor to a reciprocating movement of the carriage (3) along the guide (10); and
- a second transmission (8, 9) arranged between the carriage (3) and the at least one saw blade (4A, 4B) for transforming the reciprocating movement of the carriage (3) to a rotation of said at least one saw blade (4A, 4B).
Description
- The present invention relates to a cross-cutting circular saw device. The present invention further relates to a method of cross-cutting an object.
- In furniture manufacturing, for example, low weight board elements are widely used. Such elements may comprise a hollow body enclosing a lightweight filling material. Such low weight board elements can be used as building elements, door panels, and as a large number of different furniture elements, such as furniture elements of cabinets, wardrobes, book shelves, table tops etc. For example, such board elements may include two sheets of a low weight, environmentally friendly and inexpensive material such as fibrous board having a thickness of about 2 millimeters forming the two faces of the board element and spaced apart by spacing elements. The spacing elements may include board strips having a thickness of about 2 mm and a width of about 14 to about 18 mm standing on their longitudinal edges parallel to the length of the sheet. The spacing elements may also include solid block or pad members, e.g. to permit attachment screws to penetrate and be firmly anchored therein, and laths provided along each edge of the panel. Such laths can be produced by gluing together board strips of the kind described above, and the solid block or pad members can be produced by cutting the laths to pieces of a predetermined length and gluing them together to form the solid block or pad members. Of course, the board elements could also be of other dimensions and also of other types, including for example chip board and particle board elements.
- Existing machinery for sawing board elements, laths and/or pads present one or more disadvantages, e.g. that most existing machines require relatively much power to operate at a high production level and/or have a functional set-up that makes it difficult to keep a high production level, and require two motors, one for rotating the saw blade and one for moving the rotating saw blade across the object to be cut.
- The object of the present invention is to provide a cross-cutting circular saw device that minimizes at least one of the above disadvantages.
- In accordance with the present invention, this object is achieved in that the cross-cutting circular saw device comprises:
-
- a frame;
- a guide carried by the frame and adapted to span an object to be cross-cut by sawing;
- a carriage mounted for reciprocal movement along the guide;
- at least one circular saw blade carried by the carriage;
- a motor for moving the carriage and rotating said at least one saw blade, said motor being fixed to the frame;
- a first transmission arranged between the motor and the carriage for transforming an output of the motor to a reciprocating movement of the carriage along the guide; and
- a second transmission arranged between the carriage and the at least one saw blade for transforming the reciprocating movement of the carriage to a rotation of said at least one saw blade.
- Thanks to the invention merely one motor may be used to power the machinery. Further the technical solution provides reliable and secure operation. A single motor may provide both the reciprocating movement of the carriage and the rotation of the at least one saw blade. Thereby the complexity of the saw device is reduced. Furthermore, the weight of the carriage is reduced, since the single motor is mounted on the frame.
- Preferably, said at least one saw blade comprises a first circular saw blade and further comprises an additional second circular saw blade carried by the carriage. Said first and second saw blades are mounted in tandem with each other, and they are both, at least occasionally, rotated by the second transmission.
- Thanks to this solution many advantages may be gained, e.g. cutting in both directions (i.e. back and forth), and ability to always use a cut down milling of the front blade, etc. The two saw blades preferably have identical thickness, more preferably the two saw blades are of identical type. Thanks to this feature the trailing saw blade may follow without any substantial resistance in the already cut groove.
- According to a preferred embodiment the saw blade/-s is/are connected to its drive shaft via a free wheel device, such that the respective saw blade may only forcibly be driven in one direction, preferably its sawing direction, enabling powering one blade at a time, using one and the same main transmission/motor. Preferably, the free wheel device is a free wheel hub arranged on the carriage, between the drive shaft of the saw blade and the transmission device, such as the sprocket or pulley, being in contact with a power transmitting element. This provides for an energy efficient and low weight arrangement.
- More preferably, there are a first and a second saw blade that are mounted in tandem with each other, and each of the saw blades is connected to a free wheel drive, meaning that each saw blade is only driven when being in position as the leading saw blade, and being driven in its sawing direction, meaning that the saw blade being in position as trailing saw blade is idle rotating in its sawing direction, which rotational direction is opposite to that of the leading saw blade. An advantage of this embodiment is that when the carriage changes direction of movement, and thereby also changes from, e.g., driving the first saw blade to driving the second saw blade, the second saw blade, now to become the leading saw blade, is already rotating/idling in its intended sawing direction and therefore accelerating the second saw blade to its intended rotational speed becomes much faster and requires much less power, compared to if it had been necessary to change the rotational direction of the second saw blade. Hence, each saw blade is always rotating in its intended sawing direction, and is driven when in position as leading saw blade, and idling in the same rotational direction when in position as trailing saw blade.
- Alternatively the first saw blade is mounted so as to rotate in its sawing direction when the first saw blade is the leading saw blade of the carriage and to rotate in a non-sawing direction when the first saw blade is the trailing saw blade. Similarly, the second saw blade is mounted so as to rotate in its sawing direction when the second saw blade is the leading saw blade of the carriage and to rotate in a non-sawing direction when the second saw blade is the trailing saw blade, i.e. both saw blades are forcibly driven in both directions of carriage movement and the two saw blades are always rotating in the same direction. This alternative, which may be advantageous in some applications, takes away the need for using free wheel devices, although requiring a motor of larger power.
- The first transmission may be a mechanical, hydraulic, pneumatic or electric transmission to cause the carriage to reciprocate along the guide, but most preferably it is a first mechanical transmission.
- The motor has an output shaft, and as an example, the first mechanical transmission may include mechanically operated rods, but preferably the first mechanical transmission includes a reciprocal chain or belt having two ends attached to the carriage, and at least two wheels in operative contact with the reciprocal chain or belt, of which wheels at least one wheel, which preferably is a sprocket or toothed pulley, is fixed to the output shaft, while the other wheel is mounted rotary on the frame, so that a rotation of the output shaft causes a movement of the carriage along the guide.
- The second transmission suitably includes:
-
- a power transmitting element, such as a friction and/or form element, such as a chain, a rack, preferably a geared rack, or a belt, preferably a toothed belt, fixed to the frame and extending along the guide; and
- a transmission device, such as a friction and/or form operated transmission device, such as a sprocket, or a pulley, such as a toothed pulley, mounted on the carriage in driving contact with the power transmitting element and operatively connected to said at least one saw blade, so that a movement of the carriage along the guide causes the transmission device to be driven by the power transmitting element and thereby rotate said at least one saw blade.
- Suitably, the second transmission further includes a gearing, operatively connected between said at least one saw blade and the friction and/or form operated transmission device mounted on the carriage, said gearing providing a suitable rotational speed for said at least one saw blade. To easily achieve the desired rotary speed of said at least one saw blade, the gearing preferably is a planetary gearing.
- The second transmission further preferably includes at least one guide roller carried by the carriage for guiding the power transmitting element, which has the shape of a belt or chain, such that the power transmitting element wraps a circumferential portion of the transmission device, which has the form of a sprocket or pulley, mounted on the carriage.
- It is also suitable that the guide has an acceleration section, where the carriage is accelerated, and the carriage first passes this acceleration section before arriving at the object to be cross-cut, implying that the saw blade has been powered to a desired rotational speed prior to start of cutting in the object.
- Preferably, the carriage during its travel through the acceleration section reaches at least 50%, more preferably at least 75%, of full speed. An advantage of this embodiment is that it provides for accelerating the rotational speed of the saw blade/-s to a suitable speed for efficient cutting of the object to be cross cut.
- For preventing a rotating saw blade to wound a person and also to prevent sawdust from spreading, the carriage preferably includes a housing surrounding a major portion of said at least one saw blade, said housing preferably having a sawdust outlet adapted to be connected to a suction device for removing sawdust.
- The saw device is suitable for cutting various types of board elements, including but not limited to hollow board elements, chip board elements, particle board elements, solid wood board elements, plywood board elements, fiber board elements, board elements made from combinations of several materials etc.
- According to a further aspect of the present invention there is provided a method of cross-cutting an object by a circular saw device comprising a frame; a guide carried by the frame and adapted to span the object to be cross-cut by sawing; a carriage mounted for reciprocal movement along the guide; and at least one circular saw blade carried by the carriage, the method comprising:
-
- moving the carriage along the guide by a motor being fixed to the frame and a first transmission arranged between the motor and the carriage, the first transmission transforming an output of the motor to a reciprocating movement of the carriage along the guide; and
- transforming the reciprocating movement of the carriage to a rotation of said at least one saw blade by a second transmission arranged between the carriage and the at least one saw blade. This method provides for efficient and fast cross-cutting of objects.
- In the following, the invention will be described in more detail with reference to preferred embodiments and the appended drawings.
-
FIG. 1 is a perspective view of a preferred embodiment of a cross-cutting circular saw device in accordance with the present invention and viewed from the feed side. -
FIG. 2 is a perspective view of the saw device ofFIG. 1 as viewed from an opposite direction and with some components not shown for better clarity. -
FIG. 3 is a perspective view showing a travelling carriage, parts of the first and second transmissions, and two circular saw blades arranged in tandem. -
FIG. 4 is a perspective view showing from another angle a firmly held object being cut by the saw blade carried by the travelling carriage that has a suction outlet for removing sawdust. -
FIG. 5 is an exploded view of some of the components of the second transmission and the two circular saw blades. -
FIG. 6 is an exploded view of some of the components of the second transmission and the circular saw blades, according to a second embodiment. -
FIG. 7 is a perspective view showing a travelling carriage similar toFIG. 3 , with components as presented inFIG. 6 . -
FIG. 1 shows a preferred embodiment of a cross-cutting circular saw device in accordance with the present invention. The saw device comprises aframe 1, aguide 10 carried by theframe 1 and adapted to span an object 5 (shown inFIG. 4 ) to be cross-cut by sawing, acarriage 3 mounted for reciprocal movement along theguide 10, at least onecircular saw blade carriage 3, and amotor 11 for moving thecarriage 3 and rotating said at least onesaw blade motor 11 being fixed to theframe 1. The saw device further comprises afirst transmission 2 and asecond transmission FIG. 2 , thefirst transmission 2 is arranged between themotor 11 and thecarriage 3 for transforming an output of themotor 11 to a reciprocating movement of thecarriage 3 along theguide 10, and thesecond transmission carriage 3 and the at least onesaw blade carriage 3 to a rotation of said at least onesaw blade - The
guide 10 includes two parallel guide rails, an upper one 101 and a lower one 102 best shown inFIG. 4 .FIGS. 4 and 5 show that thecarriage 3 has at least oneupper guide follower 31 cooperating with theupper guide rail 101, and at least onelower guide follower 32 cooperating with thelower guide rail 102 to permit thecarriage 3 to travel along a predetermined path along theguide 10 and across theobject 5 to be cross-cut. - Circular saw blades have been in use for a long time and generally consist of a circular disk with cutting teeth formed into or attached to the periphery of the disk and a bore formed at the center of the disk to allow the mounting of the blade on a rotary driven shaft. A circular saw blade includes a generally circular blade portion and a plurality of spaced apart teeth extending outwardly from the circular blade portion. Each tooth has a leading edge and usually a positive rake. A tooth that is swept in the intended direction of rotation (that is inclined in the direction of rotation) is said to have a positive rake, a tooth that exhibits no inclination is said to have no rake and a tooth that exhibits inclination opposite to the direction of rotation is said to have a negative rake. Usually the positive rake is in a range of between about 20 and about 45 degrees, and a saw blade can perform its sawing function only when rotating in the intended sawing direction.
- Said at least one
saw blade object 5 both during the first stroke of thecarriage 3, when the saw blade rotates in a first direction, and during the return stroke of thecarriage 3, when the saw blade rotes in an opposite direction. Even though such symmetrical saw blades can be used, it is often more preferred to use saw blades where each tooth has a positive rake and the shape of a breaking wave, which results in better cutting properties, such saw blades being of asymmetrical shape and having one specific sawing direction in which they have the proper function of sawing. When using a single saw blade of such asymmetrical shape the saw blade may typically perform its sawing function in the first stroke of thecarriage 3, but such asymmetrical saw blade is not suitable for sawing in the return stroke of the carriage, meaning that the return stroke of thecarriage 3 would be performed without contact with any object to be cross-cut. - Consequently, in the most preferred embodiment shown in the drawings, said at least one
saw blade circular saw blade 4A and an additional secondcircular saw blade 4B, both of which are carried by thecarriage 3. The first and second sawblades carriage 3 they are being rotated by thesecond transmission carriage 3 thesaw blades - The two saw blades preferably are identical and the
first saw blade 4A is mounted so as to rotate in its sawing direction when thefirst saw blade 4A is the leading saw blade of thecarriage 3 and in a non-sawing direction when thefirst saw blade 4A is the trailing saw blade, and similarly, thesecond saw blade 4B is mounted so as to rotate in its sawing direction when thesecond saw blade 4B is the leading saw blade of thecarriage 3 and in a non-sawing direction when thesecond saw blade 4B is the trailing saw blade. Hence, the first and second sawblades carriage 3. It will be appreciated that the saw blade being the trailing saw blade will travel in the cut track made by the leading saw blade, meaning that the trailing saw blade will have little or no contact with theobject 5 to be cut. In the instance illustrated inFIG. 4 thefirst saw blade 4A is the leading saw blade and rotates in its sawing direction, counter-clockwise direction inFIG. 4 , while thesecond saw blade 4B is the trailing saw blade and also rotates in counter-clockwise direction, which is a direction opposite to the sawing direction ofsecond saw blade 4B, thesecond saw blade 4B travelling in a cut track formed by thefirst saw blade 4A in theobject 5. - The
motor 11 has an output shaft 111 (FIG. 1 ) and a reduction gearing 112 (FIG. 2 ) to reduce the rotational speed of theoutput shaft 111, so that a desired travelling speed of thecarriage 3 can be obtained. Thefirst transmission 2 may be a hydraulic, pneumatic or electric transmission, for example, but suitably it is a mechanical transmission. As an example, hydraulically or mechanically operated rods (not shown) could be used for pushing thecarriage 3 back and forth, but as is best shown inFIGS. 1 and 2 the firstmechanical transmission 2 preferably includes a reciprocal chain orbelt 200 having twoends carriage 3, and at least twowheels belt 200, of whichwheels wheel 203, which preferably is a sprocket or toothed pulley, is fixed to theoutput shaft 111, while theother wheel 204 is mounted rotary on theframe 1, so that a rotation of theoutput shaft 111 causes a movement of thecarriage 3 along theguide 10. - As is best shown in
FIGS. 2 and 3 , thesecond transmission -
- a friction and/or form element 80 (hereinafter mostly referred to as power transmitting element), such as a chain, a rack, preferably a geared rack, or a belt, preferably a toothed belt, which friction and/or
form element 80 is able to transmit power by its friction and/or by its form, fixed to theframe 1 and extending along theguide 10, for example the power transmitting element, e.g. thebelt 80 illustrated inFIG. 2 , may be fixed to theframe 1 at attachment points 81 and 82, and - a friction and/or form operated
transmission device toothed pulley carriage 3 in driving contact with thepower transmitting element 80 and operatively connected to said at least onesaw blade carriage 3 along theguide 10 causes the friction and/or form operatedtransmission device power transmitting element 80 and thereby the friction and/or form operatedtransmission device respective saw blade
- a friction and/or form element 80 (hereinafter mostly referred to as power transmitting element), such as a chain, a rack, preferably a geared rack, or a belt, preferably a toothed belt, which friction and/or
- Further, the
second transmission gearing FIGS. 3 and 5 operatively connected between said at least onesaw blade transmission device carriage 3, saidgearing saw blade planetary gearing saw blade - As is best shown in
FIGS. 3 and 5 , thesecond transmission guide rollers carriage 3 for guiding thepower transmitting element 80, which has the shape of a belt or chain, such that thepower transmitting element 80 wraps a circumferential portion of thetransmission device pulley carriage 3. - As is best shown in
FIG. 5 , thecarriage 3 includes a largefront plate 3A and a smaller firstrear plate 3B adapted to receive an output end and an input end, respectively, of the planetary gearings 92 and 93. The input ends of the planetary gearings 92 and 93 have input shafts, on which the sprockets or pulleys 90, 91 are mounted. A secondrear plate 3C, seeFIG. 3 , similar to the firstrear plate 3B may be located on the opposite side of the sprockets or pulleys 90, 91 to provide a space between the tworear plates guide rollers front plate 3A of thecarriage 3 also carries theguide followers FIG. 5 . Furthermore, the first and second sawblades planetary gearing gearings front plate 3A. - Referring to
FIG. 1 , theguide 10 has a total length L along which thecarriage 3 may travel during its reciprocating movement, and the saw device has a width W within which objects 5 to be cross-cut can be placed, the width W being smaller than the total length L. At each lateral end theguide 10 has anacceleration section carriage 3 is accelerated, so that thecarriage 3 first passes thisacceleration section object 5. Accelerating thecarriage 3 results in accelerating the rotational speed of thesaw blades saw blades carriage 3 along thepower transmitting element 80. The length LA of therespective acceleration section carriage 3 during its travel through theacceleration section - In
FIGS. 6 and 7 there are shown views similar to what is also shown inFIGS. 3 and 5 , but presenting an alternative embodiment. In the following merely the differing details/components will be focused upon, due to the fact that most details are the same as already described in connection withFIGS. 3 and 5 . In the exploded view inFIG. 6 it is shown that a similar kind ofpower transmitting element 80 as presented inFIGS. 3 and 5 is being used and arranged for rotation of thesaw blades plates roller 97 arranged between the power transmitting element, e.g. the belt orchain 80, and the friction and/or form operated transmission devices, e.g. the sprockets or pulleys 90, 91. This is achieved by having thepower transmitting element 80 to contact thetransmission devices power transmitting element 80 follow an upside-downU-shaped pathway 80A to follow up and around theguide roller 97, which is positioned between the twotransmission devices guide roller 97 may suffice, i.e. reducing the number of elements in the equipment to thereby save cost and reduce complexity. It is evident for the skilled person that in some applications, where it is desired to have a larger contact area between thepower transmitting element 80 and thetransmission devices FIGS. 3 and 5 , despite the extra complexity. Thepower transmitting element 80, e.g. thebelt 80 illustrated inFIG. 7 , may be fixed to theframe 1 at two attachment points, of which only oneattachment point 81 is illustrated inFIG. 7 . - In the second embodiment there is shown a preferred concept of driving the
saw blades free wheel devices second transmission final part 9 of the transmission. In the shown embodiment thefree wheel devices free wheel hubs transmission devices blade first saw blade 4A to be powered in its sawing direction, e.g. to be powered for cut down milling in a first direction, when thefirst saw blade 4A is the leading saw blade, and allowing thesecond saw blade 4B to be powered in its sawing direction, e.g. to be powered for cut down milling in a second direction, when thesecond saw blade 4B is the leading saw blade. Thanks to this arrangement several advantages are gained. Firstly it saves energy by merely powering one saw blade at a time. Secondly it saves energy by allowing the freewheeling saw blade, i.e. that saw blade which is the trailing saw blade, to continue rotating in its “cutting direction”, i.e. to continue rotating in its sawing direction, which is opposite to the direction of the leading saw blade, thereby requiring less energy input to accelerate the saw blade at each start of a new cutting stroke, in a reverse direction, since the saw blade is already freewheeling rotating in its intended cutting, i.e. sawing, direction before start of the acceleration. Hence, when viewed in the perspective ofFIG. 7 , thefirst saw blade 4A, driven by thepulley 90, is always rotating in counter-clockwise direction, and is driven when thecarriage 3 is moved to the left, and is idling when thecarriage 3 is moved to the right, wherein thesecond saw blade 4B, driven by thepulley 91, is always rotating in clockwise direction, and is idling when thecarriage 3 is moved to the left and is driven when thecarriage 3 is moved to the right. - As is best shown in
FIGS. 3 and 4 , thecarriage 3 suitably includes ahousing 30 surrounding a major portion of said at least onesaw blade housing 30 has asawdust outlet 301 adapted to be connected to a suction device (not shown) for removing sawdust.FIG. 4 also shows aholder 13 for holding theobject 5 to be cross-cut. Theholder 13 comprises a plurality ofvertical actuators 131 carried by ahorizontal beam 130 spanning the width of theobject 5. Theactuators 131 may be operated electrically, hydraulically, pneumatically or even mechanically to press theobject 5 against a suitable counter surface, such as a table or a beam 12 (best shown inFIG. 1 ), for example, having alongitudinal slot 121 for receiving a lower portion of thesaw blade - The present invention is applicable primarily in furniture industry, for example when it is desirably to increase production by utilizing also the return stroke of a cross-cutting saw device for cutting the object to be cross-cut, and/or when it is desirable to use a single motor for both rotating the saw blade and traversing the saw blade over the object to be cut.
Claims (17)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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SE1551326A SE539303C2 (en) | 2015-10-14 | 2015-10-14 | A cross-cutting circular saw device |
SE1551326-0 | 2015-10-14 | ||
SE1551326 | 2015-10-14 | ||
PCT/SE2016/050985 WO2017065679A1 (en) | 2015-10-14 | 2016-10-13 | A cross-cutting circular saw device and a method of cross-cutting an object by a circular saw device |
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US20180290222A1 true US20180290222A1 (en) | 2018-10-11 |
US10835971B2 US10835971B2 (en) | 2020-11-17 |
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US15/767,602 Active US10835971B2 (en) | 2015-10-14 | 2016-10-13 | Cross-cutting circular saw device and a method of cross-cutting an object by a circular device |
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US (1) | US10835971B2 (en) |
EP (1) | EP3362234B1 (en) |
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RU (1) | RU2715863C2 (en) |
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CN114918484A (en) * | 2022-05-11 | 2022-08-19 | 宁波市奉化明德铜业有限公司 | Copper bar cutting device and using method thereof |
US11511360B2 (en) * | 2017-09-20 | 2022-11-29 | Sumitomo Electric Sintered Alloy, Ltd. | Machining method, method for manufacturing planetary carrier, and planetary carrier |
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RU181706U1 (en) * | 2018-03-19 | 2018-07-26 | Федеральное государственное автономное образовательное учреждение высшего образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" | Universal circular wood-cutting saw |
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US11511360B2 (en) * | 2017-09-20 | 2022-11-29 | Sumitomo Electric Sintered Alloy, Ltd. | Machining method, method for manufacturing planetary carrier, and planetary carrier |
CN114918484A (en) * | 2022-05-11 | 2022-08-19 | 宁波市奉化明德铜业有限公司 | Copper bar cutting device and using method thereof |
Also Published As
Publication number | Publication date |
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SE539303C2 (en) | 2017-06-27 |
WO2017065679A1 (en) | 2017-04-20 |
CN108290310B (en) | 2021-07-30 |
SE1551326A1 (en) | 2017-04-15 |
RU2715863C2 (en) | 2020-03-03 |
CA3001466C (en) | 2023-12-19 |
CN108290310A (en) | 2018-07-17 |
EP3362234A4 (en) | 2019-05-15 |
EP3362234A1 (en) | 2018-08-22 |
PL3362234T3 (en) | 2023-09-18 |
US10835971B2 (en) | 2020-11-17 |
EP3362234B1 (en) | 2023-06-07 |
RU2018115325A (en) | 2019-11-14 |
RU2018115325A3 (en) | 2020-01-24 |
CA3001466A1 (en) | 2017-04-20 |
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